RAM 2500 Truck 2WD L6-5.9L DSL Turbo (2008)
Torque Converter Check Valve: Service and Repair
DIESEL ENGINE
The converter drainback check valve is located in the in the TOC pressure - supply line, between the engine mounted transmission oil cooler and the air
to oil transmission oil cooler. The valve prevents fluid drainback when the vehicle is parked for lengthy periods. The valve check ball is spring loaded
and has an opening pressure of approximately 2 psi.
The valve is serviced as an assembly; it is not repairable. Do not clean the valve if restricted, or contaminated by sludge, or debris. If the valve fails, or if
a transmission malfunction occurs that generates significant amounts of sludge and/or clutch particles and metal shavings, the valve must be replaced.
If the valve is restricted, installed backwards, or in the wrong line, it will cause an transmission overheating condition and possible transmission failure.
CAUTION: The drainback valve is a one-way flow device. It must be properly oriented in terms of flow direction for the cooler to function
properly. The valve must be installed in the pressure line. Otherwise flow will be blocked and would cause an transmission overheating
condition and eventual transmission failure.
